Frequently Asked Questions — Cardiff South and Penarth Constituency

Who won the Cardiff South and Penarth constituency election in 2015?

Labour held Cardiff South and Penarth constituency at the 7 May 2015 General Election. Labour won with a majority of 7,453 votes (16.0%). Turnout was 61.4%.

What does swing mean in UK elections?

Swing measures how much support has shifted between two parties compared to a previous election. The Butler swing formula — used in British election reporting since the 1950s — takes the average of the gain in the winner's vote share and the loss in the runner-up's. A 5% swing is considered large at ward level; anything above 10% is exceptional. The swing figure for Cardiff South and Penarth in 2015 is shown in the statistics above.